Compilare: user.cpp: In function ‘int inc(int&)’: user.cpp:24:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:68:22: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(a && inter(a,v[i].x,v[i].y) || inter(a,v[i].x+w,v[i].y) || inter(a,v[i].x,v[i].y+h) || inter(a,v[i].x+w,v[i].y+h)) {ok=1;break;} ^ user.cpp:45:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harta2.in", "r", stdin); ^ user.cpp:46:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harta2.out", "w", stdout); ^ user.cpp:47:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:50:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v[i].x,&v[i].y); ^